Gem：Module的未定义方法`source_index'（NoMethodError）

我正在运行Rails 2.3.5应用程序，并且在运行脚本/服务器时显示以下内容：

./script/../config/../vendor/rails/railties/lib/rails/gem_dependency.rb:21:in `add_frozen_gem_path': undefined method `source_index' for Gem:Module (NoMethodError)
    from ./script/../config/boot.rb:60:in `load_initializer'
    from ./script/../config/boot.rb:44:in `run'
    from ./script/../config/boot.rb:17:in `boot!'
    from ./script/../config/boot.rb:123
    from script/server:2:in `require'
    from script/server:2

如果我在boot.rb（Rails :: GemDependency.add_frozen_gem_path）中注释掉第60行并运行脚本/服务器，则会得到以下信息：

=> Booting WEBrick
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
./script/../config/../vendor/rails/railties/lib/rails/gem_dependency.rb:21:in `add_frozen_gem_path': undefined method `source_index' for Gem:Module (NoMethodError)
    from ./script/../config/../vendor/rails/railties/lib/initializer.rb:298:in `add_gem_load_paths'
    from ./script/../config/../vendor/rails/railties/lib/initializer.rb:132:in `process'
    from ./script/../config/../vendor/rails/railties/lib/initializer.rb:113:in `send'
    from ./script/../config/../vendor/rails/railties/lib/initializer.rb:113:in `run'
    from /home/developer/bigpink/config/environment.rb:13
    from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
    from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
    from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in `new_constants_in'
    from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
    from /home/developer/bigpink/vendor/rails/railties/lib/commands/server.rb:84
    from script/server:3:in `require'
    from script/server:3

因此，不是很确定该怎么做。希望我能得到一些快速的帮助。谢谢！

我只是在尝试将较旧的Rails应用程序从REE 1.8.7升级到1.9.3-p385时遇到了这个问题。奇怪的是，Ruby 1.9.3-p327可以正常工作。结果是ruby-1.9.3-p385为我安装了RubyGems版本2.0.2，而1.9.3-p327已安装了RubyGems v1.8.23。

Gem.source_index已经弃用了一段时间，但是由于Rails 2.3除了重要的安全补丁程序之外没有其他更新，因此永远不会得到修复。RubyGems v2.0最终删除了该方法。降级到rubygems2.0.0之前的任何版本，例如1.8.25，以立即恢复该功能。您可以使用来获得兼容版本gem update --system 1.8.25。

除了一个非常重要的方面，Rails 2.3.5需要更新到最低2.3.17。有一些严重的安全漏洞使您容易受到一些非常讨厌的攻击。从长远来看，升级到3.x被认为是非常需要的。

对于rvm用户，

rvm install rubygems 1.8.2 --force

这对我有帮助：http : //djellemah.com/blog/2013/02/27/rails-23-with-ruby-20/

我与结合使用gem update --system 1.8.25，您的案例可能不需要。

另一种方法是安装slimgems ：gem install slimgems。这是RubyGems的嵌入式分支，可与旧版本更好地配合使用。